Rhomboid paper cutting attachment



June 8, 1965 D. L. POLLARD RHOMBOID PAPER CUTTING ATTACHMENT 5 Sheets-Sheet 1 Filed Nov. 28, 1962 INVEN TOR.

54,55 ,5. PQJ/YED F/yiz June 8, 1965 n. L.-POLLARD v 3,187,514

RHOMBOID PAPER CUTTING ATTACHMENT Filed Nov. 28, 1962 5 Sheets-Sheet 2 @675 f 5% f6 I 70 70 65 34% INVENTOR.

June 8, 1965 D. L. POLLARD 3,187,614

RHOMBOID PAPER CUTTING ATTACHMENT Filed Nov. 28, 1962 5 Sheets-Sheet 4 INVENTOR.

DAZA" 4'. P0444295 June 8, 1965 D. L. POLLARD 3,137,614

RHOMBOID PAPER CUTTING ATTACHMENT Filed Nov. 28, 1962 5 Sheets-Sheet 5 INVENTOR 17,445 A Ra; 4,420

United States Patent Filed Nov. 28, 1962, Ser. No. 240,659 6 Claims. (Cl. 83-207) This invention relates to guillotine type sheet cutting machines and the like, and particularly to means for feeding, positioning, and holding sheets to be cut by a guillotine blade.

Devices of this type utilize three primary elements; namely, a back gauge for feeding and positioning the pile of sheets, a vertically descending clamping bar, and a guillotine blade. A pile of large rectangular sheets are cut into a number of rectangular row-piles and the rowpiles are turned perpendicularly to their original position and cut into individual rectangular piles.

ice

lar thrust, when the means of angular thrust passes under the auxiliary sheet holding clamp. 7

These and other objects and advantages will become apparent to those skilled in the art by referring to the following description and the accompanying drawings,

i wherein: a I

When a rhombic shaped pile is desired, an angular side guide wall and a laterally moveable back wall are also required. The combination perpendicular movement of the back gauge and the controlled lateral movement of an auxiliary back wall create the desired angle of thrust. In this instance, when the back wall passes under the vertically descending clamp, the clamp will only descend to the top of the back wall unless the back wall is collapsible. This is a necessity because paper will compress under pressure. The back wall must be higher than the row-piles to serve as a stop, and the straight wall results in the thrust occurring on other than the axis of the rowpiles.

As shown by the invention, it is proposed to create a formed back wall with a series of recesses exactly the shape of the perfectly aligned row-piles on an angle. A cut is made across the front of the form, creating a series of vertical walls parallel to the cutting blade, for the cutting of rectangular row-piles. The end of the form is cut off next to the side guide wall, creating an identical shifting in each row-pile placed on an angle and provid ing clearance for the second and additional row-piles to seat in their corresponding recesses. Horizontal openings are cut in the upper portions of the angular guide walls to receive angular clamp extensions, when the formedback gauge passes under the clamp.

By means of the invention it is possible to reverse the position of the angular side guide wall to its more desirale supplementary angle and to control the movement of the angularly placed row-piles through the use of a formed back gauge wall. The formed back wall may be of one piece or created by a series of connected blocks of specific measurement, or a combination, the advantage of the blocks being they may be assembled in different positions ii the position of the angular side guide wall is changed. The blocks may'also be shimmed? to secure a more perfect alignment.

The construction of the sheet cutting machine is not shown in detail as it does not pertain to the invention.

Accordingly, one object of this invention is to provide a formed auxiliary back gauge wall, one portion of which is used to cut rectangular row-piles and an angular portion to be used when cutting the rectangular row-piles on an angle.

One object of this invention is to create a means of angular thrust that provides a guide surface having a plurality of contact points across the back edge of the rowpiles to be cut on an angle.

Another object of this invention is to create the means of angular thrust along the axis of the row-pile'to be cut on an angle.

Still another object of this invention is to allow the auxiliary sheet holding clamp to mesh on an angle and partially lower vertically into the formed means of angu-' FIGURE 1 is a plan view of the back gauge, the clamp, and the blade of a guillotine type paper-cutting machine.

FIGURE 2 is a plan view of the guillotine type papercutting machine incorporating one form of modification, in present use, for rhomboid cutting.

FIGURE 2a is a plan view of one form of the auxiliary clamp attachment of FIGURE 2, in present use.

FIGURE 3 is a plan view of the guillotine type sheetcutting machine of FIGURE 1 incorporating the formed auxiliary back gauge wall and the meshing auxiliary formed clamp of the invention.

FIGURE 3a is a plan view of the auxiliary clamp attachment shaped to mesh and partially depress into the auxiliary formed back gauge wall of FIGURE 3.

FIGURE 4 shows the positioning of the large rectangular sheets in a pile against a series of vertically beveled faces of the formed auxiliary back gauge wall, for the cutting of rectangular row-piles. This series of vertically beveled faces is parallel to the cutting blade.

FIGURE 5 is an enlarged perspective view of one form of the auxiliary back gauge wall, the angular side guide Wall, and the auxiliary clamp of FIGURE 2, in present use, for the angular cutting of rectangular rowpiles. The forward thrust occurs at the corners of the rectangular row-piles.

FIGURE 6 is an enlarged perspective view showing the positions of the rectangular row-piles against the angular faces of the auxiliary formed back gauge. 1e angular faces of the auxiliary back gauge wall are horizontally perpendicular to the angular side guide wall. The angular side guide wall is positioned on the supplementary angle to that of FIGURE 5. The angular finger-like extensions of the auxiliary clamp attachment are shown as being slidably moveable in a track.

FIGURE 7 is an illustration of the sequence used to cut the final label of the row-strip into the shape of a parallelogram. The sequence is from right to left and the cut has been made on the right strip. The right rowstrip is turned end to end and positioned as shown in the center. The left position shows the finished parallelogram after the final out has been made on the center rowstrip.

FIGURE 8 is an enlarged view of a series of angle forming blocks forming the auxiliary back gauge wall assembled in a reverse position to that shown in FIGURE 7. Any method of fastening the blocks may be utilized.

FIGURE 9 is a perspective view of a front block of the auxiliary back gauge wall and has two vertical faces that form two different angles to the cutting blade.

FIGURE 10 is a perspective view of an angle forming block of specific thickness and whose length is equal to the Width of two row-piles.

FIGURE 11 is a perspective view of an angular adjustable clamp attachment extension for use with the auxiliary clamp attachment of FIGURE 3a and lowers vertically into the openings of the formed back gauge wall of FIGURE 3.

FIGURE 12 is an end elevation of the auxiliary clamp attachment of FIGURE 3a modified for use with the extension of FIGURE 11.

FIGURE 13 is a cross section taken along line 13-13 of FIGURE 4 showing the lateral track and the fastening of the formed back gauge to the back gauge auxiliary wall.

FIGURE 14 is a perspective view of the bed of the guillotine type cutting machine with the attachments in place.

Referring now to FIGURE 1, a conventional sheet cutting machine 20 has a bed or table 22 with track means 23 for moving a back gauge 24 perpendicularly toward and away from a cutting blade B. Back gauge 24 is made of multiple portions, as shown, having wings 26 at the ends. Back gauge 24 with Wings 26s have a plurality of spaced parallel extensions 28 which are alternately set relative to a plurality of spaced parallel extensions 32 of a clamp 30 adjacent the back of blade B.

With this device, a pile of sheets is placed on the bed 22 with some of the extensions 28 engaging the back edge 7 of such pile. The back gauge 24- is moved forwardly perpendicular to the blade B to feed and position the pile of sheets under the clamp and the blade B. The blade B and the'clamp 30 move downwardly in unison until the clamp engages the pile. At that point, only the blade B continues to move and cut the papers of the pile.

To obtain an angularly disposed cut edge, the sheetcutting machine 20 is presently modified as shown in FIGURE 2. One wing 26 is removed from back gauge 24 and a clamp attachment 34 is fixed to the bottom of clamp 30 and has an angularly offset end 36. A side guide wall 50 is connected to bed 22 and positionedon a predetermined angle. An auxiliary back wall 52 has a pair of rollers 54 and 56 engaging alternate sides of the side guide wall 56 and is disposed between the back gauge 24 with wing 26 and a number of row-piles to be cut on an angle with the side of the row-pile engaging the side guide wall 50. Considering a plurality of row-piles to be cut simultaneously, as shown in FIGURE 5, there are a plurality of piles P, the first positioned against the side guide wall 56 and the other sequentially abutting sides of one another. It should be noted that only the trailing corner Pc of each pile P is engaged by the auxiliary back wall 52. FIGURE 13 shows the auxiliary back wall 52 slidingly connected to a track 52a attached to backgauge extensions 28.

In accordance with the invention, a formed offset gauge 60 is used with the auxiliary back wall 52, the same being rigidly connected .thereto (see FIGURE 6). The formed ofiset. gauge 6t).has a plurality of horizontally spaced slots 62 parallel to angular side guide wall 50 and a plurality of aligned recesses with respective faces 64 and 65 perpendicular and parallel to slots 62. A front block 70 is disposed in each recess 64 and has a slot 72 aligned with a corresponding slot 62. Each block 70 has a vertical face 74 to engage a row-pile P, as shown in FIGURE 6, that is perpendicular to slot 72. Additionally one end 76 of each blockfitl. is beveled, as at 78, creating a face which is parallel to blade B. The said bevelled edge being used to engage the back edge of the pile for rectangular row-pile cutting, and for the final reversed cut of the angular row-pile to form a parallelogram (see FIG. 7).

It should be noted that the width of the first recess 64 of the formed offset gauge 60 adjacent to the side guide wall 50 may be altered as desired, while at the same time being kept perpendicular to the side guide wall 50 and equidistant from the blade B. Note that all recesses must be the width of the piles P excepting the recess on either end of the formed offset gauge. There should be one more recess and parallel face in the formed offset gauge than there are row-piles Ps to be cross-cut on an angle, because the row-pile must be reversed and positioned against part oftwo parallel walls for the final cut, as shown in FIGURE 7.

With the formed offset gauge 60, a modified clamp attachment 34a is preferred, as shown in FIGURE 3a, said clamp having an offset end 36 1 and a,plurality of angular finger-like extensions 3S-which may ultimately be received in slots 62-72. An attachment of this type maypreferably have adjustable fingers both angularly and laterally and isshown in FIGURES l1 and 12. In this arrangement, attachment 34b is the same as the attachment 34 but has a slot 40 to form a track for a slide 42 of finger 3812. Slide 42 is moved in track 40 to position finger 38b and is locked by a plate 44 that is clamped against the attachment 34b by a bolt 46. It should be seen thatfingers 38 and 38b are angularly oifset from the perpendicular as are slots 62 and 72.

The formed offset gauge 60 may be a composite of a plurality of blocks 60a as shown assembled in FIGURES 7 and 8. A block 601; is shown in FIGURE 10 as having a pair of spaced slots 62a corresponding to slots 62 and a face 64a corresponding to a face of a recess 64. One end of each block 60a has a pair of vertically beveled ends 66 which combine when joined with other blocks 60a to provide attaching surfaces to the laterally operating straight back wall 52 of FIGURE 2. For example, with side guide wall 50 forming a 75 degree angle to the blade B a series of connected blocks each 5 inches long and overlapping each other 2 /2 inches will form a line parallel to the blade B and have faces offset on 15 degree angles to the blade B if the block-s are .670'of an inch thick, because 75 degrees 15 degrees Sm 2.5 inches .670 inch A face block 76) is illustrated in FIGURE 9 and is used to increase the length of the slot 62a of block 60a to pro vide sufficient length for the clamp attachment extension 38. Two vertical beveled faces 78 at the end are provided, one being used to form part of a series parallel to the blade B when the angular side guide wall 50 is toward one side of the machine 20, and the other being used when the angular side guide wall is on the opposite side.

' In operation (FIGURES 2, 3 and 4) movement of back gauge 24 forward causes diagonal movement of auxiliary back wall 52 due to the guiding action of the rollers 54 and 56 against the side guide wall 50. Relative lateral sliding action between auxiliary back wall 52 and track 52a is provided by the interlocking construction shown in FIGURE 13. Thus auxiliary back wall 52 moves forwardly with back gauge 24 but laterally because of the thrust by side guide wall 5t); the connection shown in FIGURE 13 permits relative lateral motion required.

The approximate height of the row-pile P and the dimensions and angles of the printed matter must be known before the attachments can be constructed. The mathe matics ofthe formed back gauge wall of one piece or of a series of connected blocks is identical.

I claim:

7 1.- In combination with a sheet cutting apparatus comprising a reciprocable cutter blade and clamp attachment, a work table, a back gauge having a front face and supported on said table for movement towards and away from said blade cutter, an auxiliary side guide wall angularly adjus-tably mounted on said table, an auxiliary back wall slidably supported by said back gauge for lateral movement thereof upon movement of said back gauge, an offset gauge supported by said table and in contact with said walls, said offset gauge having formed therein a plurality of stepped recesses each being angularly oriented with respect to said back wall and consequently said cutter blade, first rectangular blocks received in said recesses and each block having one forward edge beveled so that when in said recesses, said forward edges form a series of planar surfaces parallel to said cutter blade.

2. The combination in accordance with claim 1, wherein said recesses of said offset gauge each have one forward edge beveled so that said forward edges form a series of planar surfaces parallel to said cutter blade, and

said recesses have aligned top opening slots parallel to 3. The combination in accordance with claim 1,

wherein said ofiset gauge and blocks have aligned top.

opening slots parallel to said side wall .whereby the said clamp attachment may engage the material to be cut without interference with the olfset gauge.

4. The combination in accordance with claim 3, wherein the said clamp attachment includes a plurality of moveable slides having angularly oriented fingers receivable in said slots and positionable along a track in the attachment, and locking means fixedly connecting said slides in said track.

5. The combination in accordance with claim 1, wherein said recesses in the offset gauge are formed by a series of overlapping second blocks. 7

6. The combination in accordance with claim 5, wherein said second blocks have at least one beveled edge and a plurality of top opening slots therein for receiving said clamp attachment.

References Cited by the Examiner UNITED STATES PATENTS 252,779 1/82 Kraiss 269-37 X 1,452,809 4/23 Logue 83-415 1,804,248 5/31 Crossley 269-319 X 2,329,890 9/43 Fisher 83-418 FOREIGN PATENTS 748,402 7/ 33 France.

713,076 10/41 Germany.

3,865 2/01 Great Britain.

ANDREW R. JUHASZ, Primary Examiner.

LEON PEAR, Examiner- 

1. IN COMBINATION WITH A SHEET CUTTING APPARATUS COMPRISING A RECIPROCABLE CUTTER BLADE AND CLAMP ATTACHMENT, A WORK TABLE, A BACK GAUGE HAVING A FRONT FACE AND SUPPORTED ON SAID TABLE FOR MOVEMENT TOWARDS AND AWAY FROM SAID BLADE CUTTER, AN AUXILIARY SIDE GUIDE WALL ANGULARLY ADJUSTABLY MOUNTED ON SAID TABLE, AN AUXILIARY BACK WALL SLIDABLY SUPPORTED BY SAID BACK GAUGE FOR LATERAL MOVEMENT THEREOF UPON MOVEMENT OF SAID BACK GAUGE, AN OFFSET GAUGE SUPPORTED BY SAID TABLE AND IN CONTACT WITH SAID WALLS, SAID OFFSET GAUGE HAVING FORMED THEREIN A PLURALITY OF STEPPED RECESSES EACH BEING ANGULARLY ORIENTED WITH RESPECT TO SAID BACK WALL AND CONSEQUENTLY SAID CUTTER BLADE, FIRST RECTANGULAR BLOCKS RECEIVED IN SAID RECESSES AND EACH BLOCK HAVING ONE FORWARD EDGE BEVELED SO THAT WHEN IN SAID RECESSES, SAID FORWARD EDGES FORM A SERIES OF PLANAR SURFACES PARALLEL TO SAID CUTTER BLADE. 